<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password">
                    </el-input>
                </el-form-item>
                <!-- 按钮 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>

        </div>
    </div>
</template>

<script>
    export default {
        name:'Login',
        data() {
            return {
                //登录表单的数据绑定对象
                loginForm:{
                    username:'',
                    password:''
                },
                // 表单的验证规则对象
                loginFormRules:{
                    //验证用户名是否合法
                    username:[
                        { required: true, message: '请输入登录名称', trigger: 'blur' },
                        { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                    ],
                    //验证密码是否合法
                    password:[
                        { required: true, message: '请输入登录密码', trigger: 'blur' },
                        { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }

                    ]
                }
            }
        },
        methods: {
            //重置按钮
            resetLoginForm(){
                // console.log(this);
                this.$refs.loginFormRef.resetFields();
            },
            //登录
            login(){
                this.$refs.loginFormRef.validate(async valid =>{
                    if (!valid) return;
                    const {data: res} = await this.$http.post('login',this.loginForm);
                    if (res.meta.status !== 200) return this.$message.error('登录失败');
                    this.$message.success('登陆成功');
                    //将登录成功后端传回的token保存在客户端的sessionStorage中
                    window.sessionStorage.setItem('token',res.data.token)
                    //编程式导航跳转到后台主页，路由地址是/home
                    this.$router.push("/home")
                });
            }
        },
    }
</script>

<style lang="less" scoped>
.login_container{
    background-color: #2b4b6b;
    height: 100%;
}
.login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
}
.avatar_box{
   height: 130px;
   width: 130px;
   border: 1px solid #eee;
   border-radius: 50%;
   padding: 10px;
   box-shadow: 0 0 10px #ddd;
   position: absolute;
   left: 50%;
   transform: translate(-50%,-50%);
   background-color: #fff;
   img{
    width: 100%;
    height:100%;
    border-radius: 50%;
    background-color: #eee;
   } 
}
.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
.btns{
    display: flex;
    justify-content: flex-end;
}

</style>>
